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6/25/2014 12:58PM

Diane Sawyer Steps Down; What's Next for ABC News?

Diane Sawyer is stepping down from the anchor's chair of ABC's "World News," to be succeeded by David Muir, leaving the major TV networks without a female evening news anchor for the first time in nearly a decade. Media veteran Brad Adgate discusses on Lunch Break with Tanya Rivero. Photo: AP

This transcript has been automatically generated and may not be 100% accurate.

... I ... I ... the eye the ear by the Oman and the pop anchored on the ABC News if any she will step out of the ABC World News anchor chair in August ... and David Mueller currently the ABC's ... World News anchor ... will take our plates according to ABC News officials where will continue at the network ... connecting in depth investigations in prime time specials ... her to give us an insight into this major media shake out this Brat Adgate Horizon Media director of research time crafting and dining at close to ... sell and why this move now especially when readings are on ... the mean is I mean obviously you know she hasn't been thrown out I mean you know this is the highest reading World News Pakistan for five years which is ... extraordinary when you consider how ubiquitous news has become ... and on top of that she ... she won the of ... the May sweeps out is only ... fifty four in the grand scheme of things five years in the anchor chair is really not that long considering a career now why do you think she said I think in the presence of the Allied States decision I mean she uses in the late sixties and I think she wants or can of the projects it's probably ... an email and the growing to do that every every night you know anchor and newscast and be the managing editor and ... no become anchor MRI this so it's ... pretty clear that what they're not just the dog out they said that he's gonna go down as the best female news anchor and TV so far there was a mini the Uber Expect followed other female anchor right ... and you know she was solid with their numbers and I think she was well respected in really agenda was never an issue out of it which is quite yet and David your's taking place ... right now for the network myself I am very fond of David in the way is ... what the most grueling and to take on the idea I think that's a good succession who having somebody who could step in unity stems from prime time news magazine specials as you said you can take years to the weekend ... news for EPC so ... he does have a high-profile I think is very professional and I think that ... he'll do great job and he knows his age he could be there for twenty five thirty years ... that was on toward Stephanopoulos a lot of people that I like to take over for guidelines that using the person another position but again you know he's done such a great job a good morning America he noted the number one now for two straight years and yuppies has a very important role ... and this week's also been on an upswing of million and that's not working in ABC's primetime ... rather than in the fourth in the eighteen to forty nine for last two years but ... the news division has been very solid absolutely are all thank you so much knowledge that insight